Peterson, E. B. & Goward, T. 2016. Chaenothecopsis aeruginosa sp. nov., an overlooked calicioid in the Pacific Northwest of North America. — Herzogia 29: 561–565.

Northwestern North America has lately been shown to support a rich assemblage of calicioid lichenized and non-lichenized fungi. Here we describe the non-lichenized fungus Chaenothecopsis aeruginosa (Ascomycota, Mycocaliciales) as new to science. This species is endemic to the U.S. Pacific Northwest and adjacent Canada, where it ranges from Oregon northward to inland British Columbia. It is locally frequent in coastal old-growth rainforests in the southern portions of its range and inland old-growth rainforests farther north.